It sounds like you’re looking for a tool that really helped you fine-tune your content and boost your rankings—sounds like a gem! If you’re remembering a Moz tool that provided detailed content insights and suggestions, it might be worth checking out Moz's Content Optimization tool again, as it offers some great features for improving SEO.
Alternatively, if you’re open to exploring new options, there are several excellent tools out there that could match what you’re describing, such as Surfer SEO or Clearscope. They offer in-depth analysis and optimization tips to help you enhance your content effectively.